Daily wages of 10 families is given below calculate average daily wages use step deviation method daily wages in Rupees 90,120,80,85,90,130,225, 255 ,295,200

Dear student,
Given readings (xi) are 80,85,90,90,120,130,200,225,225,295
n=10
Let a (assumed mean)= 120
x-a= -40,-35,-30,-30,0,10,80,105,135,175
let h=5
ui= (xi-a)/h= -8, -7,-6,0,2,16,21,27,35
Summation of ui= -27+101= 74
Mean= a+( h*summation of ui)/n
Mean= 120+(5*74)10
Mean= 120+37
Mean= 157

Regards

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